166.203.0.0/20

AS20057 · AT&T Enterprises, LLC

Need more data or want to access it via API or data downloads? Sign up to get free access

Summary

Country	United States
Domain	att.com
ASN	AS20057
Registry	ARIN
ID	AEL-360

WHOIS Details

NetHandle:      NET-166-183-0-0-1
OrgID:          AEL-360
Parent:         NET-166-0-0-0-0
NetName:        AEL-360
NetRange:       166.183.0.0 - 166.209.255.255
NetType:        allocation
RegDate:        2025-04-01
Updated:        2025-04-01
Source:         ARIN


OrgID:          AEL-360
OrgName:        AT&T Enterprises, LLC
CanAllocate:    
Street:         208 S. Akard St.
City:           Dallas
State/Prov:     TX
Country:        US
PostalCode:     75202
RegDate:        2024-11-22
Updated:        2025-10-29
OrgAdminHandle: ZS44-ARIN
OrgTechHandle:  ICC-ARIN
OrgTechHandle:  ZS44-ARIN
OrgAbuseHandle: ABUSE7-ARIN
OrgRoutingHandle:   ROUTI59-ARIN
Source:         ARIN


POCHandle:      ICC-ARIN
IsRole:         Y
LastName:       IP Team
FirstName:      
Street:         200 S. Laurel AVE
City:           MIDDLETOWN
State/Prov:     NJ
Country:        US
PostalCode:     07748
RegDate:        2002-09-24
Updated:        2025-08-18
OfficePhone:    +1-888-876-2382
Mailbox:        rm-ipspecialist@att.com
Source:         ARIN


POCHandle:      ZS44-ARIN
IsRole:         Y
LastName:       IPAdmin-ATT Internet Services
FirstName:      
Street:         7277 164th Ave NE
Street:         Attn: IP Management
City:           Redmond
State/Prov:     WA
Country:        US
PostalCode:     98052
RegDate:        2000-05-17
Updated:        2025-08-18
OfficePhone:    +1-888-510-5545
Mailbox:        ipadmin@att.com
Mailbox:        ipadmin@semail.att.com
Source:         ARIN


POCHandle:      ABUSE7-ARIN
IsRole:         Y
LastName:       abuse
FirstName:      
Street:         2701 W 15th ST
City:           Plano
State/Prov:     TX
Country:        US
PostalCode:     75075
RegDate:        2002-08-24
Updated:        2025-08-18
OfficePhone:    +1-919-319-8167
Mailbox:        abuse@att.net
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 166.203.0.0/16

No nearby ranges found.

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
24.3.46.116	AS7922 Comcast Cable Communications, LLC	`11.68ms` from Ashburn, US
54.229.16.180	AS16509 Amazon.com, Inc.	`0.22ms` from Dublin, IE
86.4.191.68	AS5089 Virgin Media Limited	`3.86ms` from London, GB
95.125.133.116	AS3352 TELEFONICA DE ESPANA S.A.U.	`17.67ms` from Madrid, ES
58.96.84.196	AS10143 Exetel Pty Ltd	`1.37ms` from Melbourne, AU
67.160.165.212	AS7922 Comcast Cable Communications, LLC	`2.88ms` from Portland, US
82.56.195.36	AS3269 Telecom Italia S.p.A.	`14.15ms` from Rome, IT
153.204.32.100	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.27ms` from Tokyo, JP
102.155.185.212	AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom)	`15.01ms` from Tunis, TN
5.3.113.68	AS41682 JSC ER-Telecom Holding	`12.80ms` from Yekaterinburg, RU
70.109.51.84	AS701 Verizon Business	`2.26ms` from Ashburn, US
140.143.194.132	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.76ms` from Beijing, CN
67.230.58.84	AS23520 Columbus Networks USA, Inc.	`7.83ms` from Kingston, JM
175.150.72.52	AS4837 CHINA UNICOM China169 Backbone	`12.13ms` from Liaoyang, CN
97.216.62.84	AS6167 Verizon Business	`17.29ms` from Los Angeles, US
84.126.109.100	AS6739 VODAFONE ONO, S.A.	`10.61ms` from Madrid, ES
89.105.71.4	AS41381 Lucense SCaRL	`5.39ms` from Milan, IT
80.134.166.84	AS3320 Deutsche Telekom AG	`6.16ms` from Nuernberg, DE
82.64.100.68	AS12322 Free SAS	`1.56ms` from Paris, FR
160.8.128.68	AS14340 Salesforce.com, Inc.	`0.72ms` from Paris, FR
150.195.194.100	AS13150 CATO NETWORKS LTD	`0.46ms` from Phoenix, US
57.154.108.180	AS8075 Microsoft Corporation	`0.18ms` from Phoenix, US
79.36.87.52	AS3269 Telecom Italia S.p.A.	`5.02ms` from Rome, IT
129.121.3.196	AS46606 Unified Layer	`1.96ms` from Salt Lake City, US
20.214.127.148	AS8075 Microsoft Corporation	`0.30ms` from Seoul, KR

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f4 -m17 166.203.8.251

traceroute to 166.203.8.251 (166.203.8.251): 17 hops max, 52 byte packets

4 [AS8966] 5.195.70.160 1.161 ms

5 [AS8966] 194.170.186.89 3.632 ms

6 *

7 [AS3356] 4.69.209.110 283.403 ms

8 *

9 [AS7018] 32.130.24.46 213.532 ms

10 *

11 *

12 *

13 *

14 [AS20057] 166.147.126.37 219.66 ms

15 *

16 *

17 *

Measurement taken from

IPinfo ProbeNet in Al Fujairah City, AE

On December 28th 2025

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales